Checking Composite Video Output Y (Au-199 Board); Checking S Video Output S-C (Au-199 Board); Checking S Video Output Dc Level (Au-199 Board); Adjustment Related Parts Arrangement - Sony DVP-M35 Service Manual

3. Checking Composite Video Output Y
(AU-199 board)
<Purpose>
This checks composite video output Y. If it is incorrect, correct
brightness will not be attained when connected to, for instance,
projector.
Mode CXD1914 (Serial) check in test mode
menu "0" Syscon Diagnosis (8-2)
Signal Color bars
Test point J354 LINE OUT VIDEO
(Terminating 75Ω)
Instrument Oscilloscope
Specification 1 ± 0.05 Vp-p
Checking method:
1) Confirm that the Y level is 1 ± 0.05 Vp-p.
1 ±0.05 Vp-p
Fig. 6-7

4. Checking S Video Output S-C (AU-199 board)

<Purpose>
This checks whether the S-C satisfies the NTSC Standard. If it is
not correct, the colors will be too dark or light.
Mode CXD1914 (Serial) check in test mode
menu "0" Syscon Diagnosis (8-2)
Signal Color bars
Test point J354 S VIDEO OUT
Instrument Oscilloscope
Specification 286 ± 20 mVp-p
Connection:
J354 (S terminal)
100 µ F
+
C
Oscilloscope
75 Ω
100k
± 1% ± 1%
G
Fig. 6-5
Checking method:
1) Confirm that the S-C burst is 286 ± 20 mVp-p.
286 ± 20 mVp-p
Fig. 6-6
5. Checking S Video Output DC Level
(AU-199 board)
<Purpose>
This checks signals for S1 and S2 compatible TV. If they are not
correct, the TV will not switch automatically to letter box, etc.
Mode CXD1914 (Serial) check in test mode
menu "0" Syscon Diagnosis (8-2)
Signal Color bars
Test point J354 S VIDEO OUT
Instrument Digital voltmeter
Specification S-terminal 0V: 0V
+ 0
S-terminal 5V: 5.0 V
–1.5
Connection:
J354 (S terminal)
100 µ F
+
C
Digital voltmeter
75 Ω
100k
± 1% ± 1%
G
Fig. 6-4
Checking method:
1) In the test mode initial menu "0" Syscon Diagnosis, select S-
terminal 0V.
Confirm that the voltage at J354 C pin is 0V.
2) Press any key to select S-terminal 5V.
+ 0
Confirm that the voltage at J354 C pin is 5.0
–1.5
6-3

6-4. ADJUSTMENT RELATED PARTS ARRANGEMENT

MB-78 BOARD (Side A)
RV251
VIDEO LEVEL
CN002
M+12V
AU+12V
AU–12V
EVER+5.3V
REG+3.3V
CN001
REG+5.2V
V.
AU-199 BOARD (Side B)
CT201
27MHz
FREE RUN
J354
LINE OUT 1, 2
S VIDEO OUT
6-4E